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--[[--
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Button widget that shows an "×" and handles closing window when tapped
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Example:
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local CloseButton = require("ui/widget/closebutton")
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local parent_widget = OverlapGroup:new{}
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table.insert(parent_widget, CloseButton:new{
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window = parent_widget,
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})
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UIManager:show(parent_widget)
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]]
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local Font = require("ui/font")
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local FrameContainer = require("ui/widget/container/framecontainer")
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local GestureRange = require("ui/gesturerange")
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local InputContainer = require("ui/widget/container/inputcontainer")
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local TextWidget = require("ui/widget/textwidget")
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local Screen = require("device").screen
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local CloseButton = InputContainer:new{
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overlap_align = "right",
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window = nil,
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padding_left = Screen:scaleBySize(14), -- for larger touch area
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padding_right = 0,
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padding_top = 0,
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padding_bottom = 0,
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}
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function CloseButton:init()
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local text_widget = TextWidget:new{
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text = "×",
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face = Font:getFace("cfont", 30),
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}
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-- The text box height is greater than its width, and we want this × to be
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-- diagonally aligned with the top right corner (assuming padding_right=0,
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-- or padding_right = padding_top so the diagonal aligment is preserved).
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local text_size = text_widget:getSize()
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local text_width_pad = (text_size.h - text_size.w) / 2
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self[1] = FrameContainer:new{
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bordersize = 0,
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padding = 0,
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padding_top = self.padding_top,
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padding_bottom = self.padding_bottom,
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padding_left = self.padding_left,
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padding_right = self.padding_right + text_width_pad,
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text_widget,
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}
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self.ges_events.Close = {
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GestureRange:new{
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ges = "tap",
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-- x and y coordinates for the widget is only known after the it is
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-- drawn. so use callback to get range at runtime.
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range = function() return self.dimen end,
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},
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doc = "Tap on close button",
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}
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self.ges_events.HoldClose = {
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GestureRange:new{
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ges = "hold_release",
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range = function() return self.dimen end,
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},
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doc = "Hold on close button",
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}
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end
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function CloseButton:onClose()
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if self.window.onClose then
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self.window:onClose()
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end
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return true
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end
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function CloseButton:onHoldClose()
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if self.window.onHoldClose then
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self.window:onHoldClose()
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end
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return true
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end
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return CloseButton
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